Other facts from our historical weather data: Which is the warmest month in Kilchoan? August has an average maximum temperature of 17°C (63°F) and is the warmest month of the year. Which is the coldest month in Kilchoan? The coldest month is February with an average maximum temperature of 9°C (48°F). Which is the wettest month in Kilchoan? December tops the wettest month list with 248mm (9.8 in) of rainfall. Which is the driest month in Kilchoan? May is the driest month with 116mm (4.6 in) of precipitation. Which is the sunniest month in Kilchoan? May is the sunniest month with an average of 189 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.